Water Reuse

Veolia Water Technologies has the technology portfolio to treat even the dirtiest wastewater to potable water and ultrapure standards, while also harvesting valuable by-products in wastewater streams to help customers move towards zero liquid discharge.

Water
reuse applications include:

full potable reuse

facility cooling

boiler feed water

industrial process water

irrigation in agriculture and urban green spaces

ground water storage and recovery

We
have supplied some of southern Africa’s largest and most important water reuse
plants, in both the municipal and industrial sectors

The economy of water reuse

The far lower per-unit cost of recycled water over municipal
bulk water supply presents a real financial opportunity for big water users to greatly reduce their
operational cost. Especially for process water, where potable water is not
needed and presents unnecessary treatment costs that are borne by the end user,
wastewater recycling is a huge
investment for any consumer.

The financial benefits of water reuse don’t end there!
That’s why Veolia helps customers understand the True Cost of Water in their application. Investigating the True
Cost of Water seeks to evaluate and
mitigate the risk and consequences of feed water disruption. It considers
the total role of water within a client’s processes and the overall costs that
would be incurred should there be a disruption to its availability.

For industry, this considers what bottom-line costs would be
in the event of an interruption to production, either because of feed water
problems that induce downtime, or, in terms of discharge issues that may
contravene environmental regulations and force a plant shutdown (or, even more
costly, compel the client to clean up the resulting damage).

Wastewater is the only water resource
where volume increases proportionally to economic development and consumption.

Veolia: a world-leader in water reuse technologies

Specialist, state-of-the-art Veolia technologies form the
basis of our wastewater reuse solutions. There is no single specific technology
that applies to water reuse, instead, combinations of combinations involving
clarification, reverse osmosis, evaporation and chemical treatment are
involved.

Actiflo® Turbo – The ultimate clarifier

This
clarifier offers an increased rise rate of 80 m/h for industrial process water
and wastewater. It is a cost-effective, compact solution with short start-up
times, with over 870 references across the world.

BIOSTYR™ – Biological aerated filter

The
most effective biofilter on the market! Biostyr™ eliminates all pollution – organic
(COD and BOD),nitrogenous (N-NH4 and N-NO3) and particulate compounds (TSS).

EVALED™ – Evaporation technologies

These
energy efficient systems can recycle a high-quality distillate from heavily
polluted wastewater. Combined with RO technologies, these systems are ideal for
operators looking to achieve zero liquid discharge.

Water is too valuable to be used only once.

HYDROTECH – Low footprint discfilters

These
mechanical self-cleaning filters are big in efficiency and small in footprint! Includes
microscreen filtration technology.

MULTIFLO™ – Proven clarification/settling solutions

Ideal
for small to large-sized plants for any water characteristic and pollutant
loads. It’s an efficient process for removing TSS, colour, algae and heavy
metals, and suitable for average to high turbidity levels. Read more about our clarification solution.

SIRION™ Mega – Reverse Osmosis systems

Capable
of producing high-purity water from 5 to 30 m3/hr. With lower
required operating pressure, this RO solution to wastewater reuse uses less
energy, and thus provides a more cost-effective treatment solution.

OPUS® Process – Reverse Osmosis membranes for high water recovery

OPUS®
delivers high water recovery rates and effective fouling and scaling control,
with an excellent tolerance of variations in feed water quality. It provides
high salt rejection, and is an energy efficient treatment component with long
membrane life.

HYDREX™ Chemicals – Water treatment chemical solutions

Hydrex™
chemicals are used across the world to optimise the water cycle. The Hydrex™
range includes solution for all water reuse chemical requirements, and protects
water systems against scale deposition, corrosion, fouling, and so on. Reduce
unnecessary downtime, ensure optimum productivity and lower environmental risks
with the Hydrex™ range.

Case
studies: a proven track record in water reuse

Veolia is the proud supplier of award-winning water
recycling plants across southern Africa. These include municipal and industrial
solutions, from small to large-scale. Some of our reuse plants include (click
to expand):

Goreangab Water Reclamation Plant – Windhoek

Windhoek Goreangab Reclamation Plant

Veolia has played an important role in helping Windhoek
become a modern sustainable city with its central role in the New Goreangab
Water Reclamation Plant, which has been recycling the city’s wastewater since
2001. The high-tech wastewater treatment and processing plant recycles
wastewater and semi-purified sewage to a standard that is 100% safe for human
consumption.

The plant, the only one of its kind in the world providing
potable water commercially on such a large scale, supplies 21 000 m3/day
to serve the City of Windhoek – about a third of the city’s total potable water
supply.

Durban Water Recycling Project

Durban Water Recycling Plant

Veolia’s design and construction of the Durban Water
Recycling (DWR) Plant is a landmark achievement in sustainable water use in
South Africa. For the last 15 years, the plant has treated 47.5 Ml/day of
domestic and industrial wastewater to near potable standards for use in
industrial processes by high volume customers such as Mondi Paper and SAPREF.

It has meant this volume of water that was previously drawn
from the city’s potable water supply is freed up for use by the city’s growing
urban population, reducing the strain on the city’s overall water supply
infrastructure. The pollution load on the marine environment from discharge is
also significantly reduced.

Ambatovy
Mine, Madagascar

Ambatovy Mine, Madagascar

Veolia Water Technologies’ design and build of the
crystalliser at Ambatovy Mine won it an award of distinction at the Global
Intelligence Awards.

One of the largest evaporation and crystallisation plants in
the world, the plant treats and recovers mine water while drying up to
210 000 tons of ammonium sulphate per annum, which is an ideal
agricultural fertiliser and is sold as a secondary revenue stream by the mine.
It’s been labelled one of the most advanced technical achievements in industrial
wastewater treatment.